# Description: Glasgow Haskell compiler.
# URL: https://www.haskell.org/haskellwiki/Glasgow_Haskell_Compiler
# Maintainer: Danny Rawlins, crux at romster dot me
# Depends on: docbook-xsl libedit libffi libgmp readline

name=ghc
version=8.10.2
_bversion=8.10.2
release=1
_bootstrapsum=fd2dccd6f496915a5f962dab24e7eeb8bee49bcc38e74b17eac76159083538fa
#curl -s http://downloads.haskell.org/~ghc/$version/SHA256SUMS | grep ./ghc-$version-x86_64-centos7-linux.tar.xz | cut -d' ' -f1
source=(https://downloads.haskell.org/~ghc/$version/$name-$version-src.tar.xz)

build() {
	# if ghc is not previously installed bootstrap it
	if [ ! -e '/usr/bin/ghc' ]; then

		# download binary bootstrap file if it does not exist
		if [ ! -f "$PKGMK_SOURCE_DIR/$name-$_bversion-x86_64-centos7-linux.tar.xz" ]; then

			wget "http://downloads.haskell.org/~ghc/$_bversion/$name-$_bversion-x86_64-centos7-linux.tar.xz" \
				--output-document="$PKGMK_SOURCE_DIR/$name-$_bversion-x86_64-centos7-linux.tar.xz"

		fi

		if [ $_bootstrapsum != $(sha256sum "$PKGMK_SOURCE_DIR/$name-$_bversion-x86_64-centos7-linux.tar.xz" | cut -d' ' -f1) ]; then
			echo "Error Bootstrap file $PKGMK_SOURCE_DIR/$name-$_bversion-x86_64-centos7-linux.tar.xz failed sha256sum"
			exit $E_GENERAL
		fi

		mkdir tmp
		cd tmp
		bsdtar -xf "$PKGMK_SOURCE_DIR/$name-$_bversion-x86_64-centos7-linux.tar.xz"
		mv $name-$_bversion ../$name-$_bversion-binary
		cd -
		rmdir tmp

		cd $name-$_bversion-binary

		# hack for gmp and ncurses for bootstrap binary ghc
		ln -s /usr/lib/libgmp.so.10 libgmp.so.3
		ln -s /lib/libncurses.so.6 libtinfo.so.5
		export LD_LIBRARY_PATH="$(pwd):$LD_LIBRARY_PATH"

		./configure --prefix=$SRC/binary
		make install
		cd $SRC

		export PATH="$SRC/binary/bin:$PATH"
	fi

	cd $name-$version

        ./configure \
                --prefix=/usr \
                --docdir=/usr/share/doc/ghc \
                --with-system-libffi \
                --with-ffi-includes=$(pkg-config --variable=includedir libffi)

	make
	make -j1 DESTDIR=$PKG install

	rm -r $PKG/usr/share/doc
}